This 7/16" (9.525 mm) diameter spot in high quality solid brass and antique nickel platting, will accent conchos on leather. Each spot or nail head has 2 extra-long ¼” (6.4 mm) spikes. Use with spot setter 8014-00 or the hand press die SDSP203 in our store. Once threw your item, bend the prongs in or out for a secure hold. Thank you for looking and feel free to message with any questions. Made In USA